Magical gene / ground and strong white

Cracked Porcelain

A glaze laid over the whole horse and then crazed - the coat underneath shows through only as the hairline cracks between the plates. A third allele carries the same marking worked in greys instead of white - dark where the pale form is light, and the same number of steps.

What it can come out as

Outcome	Carrying
Cracked Porcelain	`Cpw/Cpw` · `Cpw/Cpc` · `Cpw/n` · `Cpw/Cpk`
Cracked Porcelain, glazed, black	`Cpk/Cpk` · `Cpk/Cpc` · `Cpk/n`
Cracked Porcelain, glazed	`Cpc/Cpc`
Wild type	`Cpc/n` · `n/n`

How each one is actually drawn - region by region, and the layers it is built from - is on the coding tab.

Crossing two of them

Finding one

About 1 in 3,572 wild horses is born showing this. That is the whole of the supply: catch one, or make one with the carrot below. Breeds set their own pools and a breed built around this gene will carry it far more often than the wild population does.

Wild pair	Shows as	How often
`Cpw/Cpw`	Cracked Porcelain	0.001% — 1 in 100,000
`Cpw/Cpk`	Cracked Porcelain	0.0013% — 1 in 75,019
`Cpw/Cpc`	Cracked Porcelain	0.0013% — 1 in 75,019
`Cpw/n`	Cracked Porcelain	0.019% — 1 in 5,263
`Cpk/Cpk`	Cracked Porcelain, glazed, black	0.0013% — 1 in 75,019
`Cpk/Cpc`	Cracked Porcelain, glazed, black	0.0013% — 1 in 75,019
`Cpk/n`	Cracked Porcelain, glazed, black	0.0013% — 1 in 75,019
`Cpc/Cpc`	Cracked Porcelain, glazed	0.0013% — 1 in 75,019
`n/n`	Wild type	99.972%

Its gene carrot

The file

common/src/main/resources/horsegenetics/genes/cracked_porcelain.json — a data-driven gene, not a Java class. It is listed in the index.json beside it and registered by Genes' class initialiser at startup.

Key	`horsegenetics.cracked_porcelain`
Phase	magical — it adds signed colour in phase 3, after the pigment has resolved
Priority	216 — where it sits in the one `(priority, key)` paint order
Alleles	`Cpw` · `Cpk` · `Cpc` · `n`
Varies per horse	4 values drawn once off the expressing allele copy, so a foal that inherits the copy inherits the look
Built from	CRACKLE, FLAT

Why it is built this way

Imported from the magic-gene intake, 2026-09-08. CRACKLE is the only mask in the vocabulary with a genuinely hard edge, which is why this gene is drawn with it rather than with a patch field - a crazed glaze whose cracks are soft is a marbled horse, not a broken pot.

The gene paints the plates and leaves the channels, rather than the other way round. That is worth knowing when reading the layer: the coat you can see IS the crack.

The black allele is the white one with the light taken out of it, and it sits one rung under white in the dominance series - so every combination that existed before it keeps the outcome it had, and only the pairs carrying Cpk are new. The re-toning is a mapping rather than a repaint: every achromatic target moves into the dark end of the scale keeping its order and its spacing, and every SATURATED one is left alone, because that colour is the gene rather than its lightness.

What it paints

Each outcome, described the way the gene file describes it, and then the layers that draw it in the order they are painted. The prose is the part a reader checks a bake against; the list underneath is what the engine actually did.

Cracked Porcelain

The horse is white the way a glazed pot is white, and the only thing left of the coat is the crack pattern: a network of fine dark lines between plates a few units across. The channels are the one hard edge in the whole mod - nothing about this gene is soft. Bigger plates mean fewer, longer cracks.

The plates are FLAT rather than TOWARD - a glaze does not let the coat show through it at all, and TOWARD at any strength below 100 would have left the horse tinted by whatever it was.

the porcelain glaze over everything but the cracks — CRACKLE, painted with FLAT

Cracked Porcelain, glazed, black

The same marking as the white form with the light taken out of it: a single near-black tone.

the porcelain glaze over everything but the cracks — CRACKLE, painted with FLAT

Cracked Porcelain, glazed

The same crazed plates in a colour the line carries rather than in white. Fully recessive: two copies, and a single copy beside the white allele glazes white.

the porcelain glaze over everything but the cracks — CRACKLE, painted with FLAT

Wild type

No glaze.

Paints nothing.